Question about 2002 Pontiac Grand Prix

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High speed vibration

I drive a 02 grand prix with 88k on it about a month ago I noticed what seemed to be a vibration in the pedals and the steering column. At this point there was no signs of a problem because I wasn't driving on the highway, but the first time I took it out on the highway I noticed that when I reached 70 mph that a slight shuttering was occuring. Now the problem seems to be worsening, when I drive between 70-72 mph the shuttering increases and can be noticed in the dash. At 75 mph the vibration is at its max but sometimes when I push through the speed to 80 mph the vibration seems to reduce. Thinking it might be the roads I have driven on four major highways and all the same result, however on rare occasion the vibration doesn't occur at all so the mystery continues for me. What is a good starting point? Before I forget, lft front rotor was replaced 3 months ago and brakes felt great up until this month, where it seems like even breaking it just seems as if there is reduced effectiveness as the wheels turn and slow down but grab fine at other points in rotation.

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I also had this problem and found that the cv joints in the transaxles were bad. I replaced the axles at a cost of $65 dollars apiece plus the cost of labor.

Posted on Apr 20, 2009

Try checking your bearings on both sides. as for your brakes when you change your rotors try changing both of them as well as your pads. i had the same problems and that fixed it. if it persists i would look at your ball joints and then your calipers. good luck.

Posted on Aug 21, 2008

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Posted on Jan 02, 2017

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this might help:
Here is the Technical Service Bulletin that maybe of help, worth looking into but can't guarantee that it would fix your problem Steering - Steering Column Clunking When Turning TECHNICAL Bulletin No.: 01-02-32-001P Date: November 25, 2009 Subject: Clunk Felt/Noise Heard From Steering Column, Steering Gear and/or Front Of Vehicle During Turning Maneuver and/or Steering Wheel Rotation (Replace Intermediate Shaft As Directed) Models: 2001-2004 Buick Regal 2005-2008 Buick Allure (Canada Only), LaCrosse 2000-2008 Chevrolet Impala 2000-2007 Chevrolet Monte Carlo 1998-2002 Oldsmobile Intrigue 2004-2007 Pontiac Grand Prix Supercede: This bulletin is being revised to add the 2008 Buick LaCrosse/Allure. Please discard Corporate Bulletin Number 01-02-32-001O (Section 02 - Steering). Condition Some customers may comment on a clunk type noise coming from the front of the vehicle while driving during a turning maneuver.

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Hello! This is a known problem that is addressed by the following Technical Service Bulletin...Guru...saailer

Subject:Steering System Moan, Groan, Shudder and/or Vibration Type Noise During Low Speed Turning Maneuvers (Replace Steering Gear) #04-02-32-007A - (12/01/2004) Models:2004-2005 Buick Rainier
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Long Wheelbase Utilities Built Prior to VIN Breakpoint 56137280
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ConditionSome customers may comment on a moan, groan, shudder and/or vibration noise while making low speed turning maneuvers. Customers usually notice this condition in parking lot turning maneuvers.
Correction
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  2. Replace the steering gear with a newly designed steering gear. See the parts information below. Refer to Power Steering Gear Replacement (SI Document ID #742314).
Parts Information

Part Number

Description

Qty
88965356
Gear Kit, Steering
(Short Wheelbase Utilities)
1
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Gear Kit, Steering
(Long Wheelbase Utilities)
1
Warranty InformationFor vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time
E9740
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Use published labor operation time
E2000
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To confirm what exactly is causing this problem.I recommend you to click the help link below and troubleshoot the problem :-----steering service light came on 2004 Pontiac Grand Prix?http://technoanswers.blogspot.in/2012/02/on-one-my-pontiac-grand-prix-relatred.html
-----------Steering service light ON ? http://technoanswers.blogspot.in/2012/02/steering-service-light-on-gmc-sierra.html
--------This links will help.Thanks.

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plz leave me a comment
reply if you need any more info

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